Without a compressor will coil cool slightly?

[ari]

I was wondering in theory if there was no compressor in an ac system when it is hotter by the condesor coil would the evap coil cool the room at all since heat will still transfer through the pipes.

[2sac]

Heat wont transfer if there is no temperature difference. The refrigerant will take on the temperature of the ambient. If the temp in the house is 80* the refrigerant will be 80*

[barbar]

If the system could thremo-syphon it would heat the room.
Energy travels from more to less.

[mechAK47]

Gh

[ari]

I made a mistake. If it is colder outside than inside and there is no compressor would the heat transfer through the pipes outside.

in another scenario if the outside coil was 100 times the size of the inside coil would the inside space be cooled even if it was hotter outside.

[barbar]

I made a mistake. If it is colder outside than inside and there is no compressor would the heat transfer through the pipes outside.

in another scenario if the outside coil was 100 times the size of the inside coil would the inside space be cooled even if it was hotter outside.

Question one, yes is possible and can be designed to achieve this, Star Refrigeration, Scotland, designed a valve and system to achieve this in the industrial refrigeration field. You could also look up heat pipes, (like you see in some solar systems) as also used in air cooling. Quite common in remote telecommunication transmission stations

Question 2

No

[hvacvegas]

I made a mistake. If it is colder outside than inside and there is no compressor would the heat transfer through the pipes outside.

in another scenario if the outside coil was 100 times the size of the inside coil would the inside space be cooled even if it was hotter outside.

the ammount of transfer would be so small, it would take us days to figure out just how small.

[54regcab]

You would need to have some type of circulator to move the fluid. I suppose it could work w/o an expansion device and a small circulator in place of the compressor. Don't know why anybody would want to do this though...

[2sac]

You would need to have some type of circulator to move the fluid. I suppose it could work w/o an expansion device and a small circulator in place of the compressor. Don't know why anybody would want to do this though...

Pucker your lips and blow.

[socotech]

If its colder outside than inside, why not just open a window? Or an economizer?

[hvacvegas]

I think he feels his unit is still cooling, even though the compressors shot.

Most likely because the fan is running, and making him FEEL cooler.

[54regcab]

I think he feels his unit is still cooling, even though the compressors shot.

Most likely because the fan is running, and making him FEEL cooler.

Or it cold be cold where he lives and it's pulling cold air through leaks in ductwork from unconditioned space.

[viceman]

you dont need a compressor. just something to raise the refrigerant pressure before the condensor.

[jpsmith1cm]

It isn't really possible to break the laws of thermodynamics.

The one in play here is that heat moves from an area of high content to an area of low content.

So, if it is warm outside and cool inside, the direction of natural heat flow is from outside to inside. A compressor is required to operate the refrigerating machine that moves the heat opposite normal flow.

A heat pipe or thermosyphon, as mentioned earlier can be setup to move heat, but isn't exactly practical, IMO, nor is it likely to happen naturally in a beneficial manner for you.

[ari]

54regcab- why would you need a circulator to move the fluid? it seems to me like a compressor speeds up the refrigeration process
why would you suppose it could work w/o an expansion device? does the expansion device make the refrigerant into a liquid by increasing the pressure into a smaller pipe?

socotech, hvacvegas, and others- this is purely hypothetical in order to better understand the equipment I am working with and there are endless applications to the question such as a basement with no windows and no ductwork for there to be an economizer. it can also be applied to refrigeration as barbar said there is a manufacturer in scotland that designed a valve and system to be applied in industrial refrigeration.

viceman- is it truely necessary to raise the refrigerant pressure before the condesor?

jpsmith1cm- I guess this is a lot simpler than I thought originally

[54regcab]

Heat would be carried through the fluid, just like the way a car radiator works. an expansion device is needed to move heat from a cooler area to a warmer one beacuase the pressure needs to be lower on the cool side. 2 different theory's of operation here....

[air1]

Heatpipes are use often for heat recovery. Exhaust air heats a volatile fluid in a heatpipe coil causing the fluid to vaporize. The vapor is then cooled by the outside air causing the vapor to condense to a fluid which flows back to the exhaust side of the heatpipe coil.

[ari]

Is the purpose of this volatile fluid procedure to remove the heat from the exhaust air quicker? isn't a heat recover system generally used to use the heat for another application?

[air1]

The heat recovered from the exhaust air is use to heat the outside air used for ventilation.

[Core_d]

in another scenario if the outside coil was 100 times the size of the inside coil would the inside space be cooled even if it was hotter outside.

You can cool by using a heat source. The heat source acting as a compressor i dont pretend to fully understand the absorption refrigeration cycle, but theirs more to it than a gaint condenser